Patent GB-190622419-A (GB)
Title: Improvements in Apparatus for Finishing and Cooling Unfinished Articles, especially Unfinished Curved Stereotypes.
Inventor: MITCHELL WILLIAM ROBERTSON
Filed: 1906-10-10
Granted: 1907-10-10
Abstract: 22,419. Mitchell, W. R., [Wood, H. A. W.]. Oct, 10. Stereotype.-Relates to a machine for trimming and cooling curved stereotype plates or other articles in which the plates are conveyed by gravity down an inclined runway first to the trimming-mechanism, then to a cooling-arch, and finally delivered on to an extension of the runway. The runway on which the stereotypes f are placed comprises a number of tapered antifriction rollers 20, Fig. 1, and during their motion down this runway the plates are trimmed on their straight edges by cutters b rotated in a direction opposite to that of the plates by a belt 23, which passes around a pulley 22 on the main shaft 21, and is kept tight by a spring- controlled jockey roller 25. The plate then passes into the arch c, where it is held by two vertically-movable clamps 91, 93, Fig. 7, provided with taper antifriction rollers 90 which w h e n the clamps are lowered aline with the rollers 20. The clamp 91 is secured to a rack 88 gearing with a segment 87 on a shaft 85, which is rocked by a cam on a shaft 38, driven intermittently from the main shaft 21 through a clutch on the shaft 33 closed by the entrance of the plate into the arch. The clamp 93 is raised to secure the plate by adjustable helical springs 94, and is depressed by an arm 99 on a shaft 86 rocked by a second cam on the shaft 38. When clamped, the plate is trimmed on its concave face by a knife 42 on a shaft 41 driven by gearing from the shaft 38. The mechanism by means of which the driving-clutch is closed by the advancing plate is shown in Figs. 1 and 10. Mounted on a shafted 630 are two fingers 62 which normally lie in the path of the plate, and an arm 59 provided with lugs 60, 61 adapted to be engaged by a stud 58 on an oscillating lever 47, which is pivoted on one arm of a bell-crank 49, pivoted at 50 and rocked by an eccentric 51 on a continuously-driven shaft 52. The plate swings the arm 59 so that the lug 60 arrests the stud 58, causing the lever 47 to actuate, by means of a link 46, the clutch fork 44. After the plate has been trimmed, the levers 64 which support the stops 62 are rocked by a cam 70 on a shaft 71 driven by bevel-gearing from the shaft 38, a stop 65 thereon engaging projections 66 on the stops 62 to rock them clear of the plate. At the same time, the rollers 20 immediately behind the arch are braked by shoes 79, operated by a cam 75 on the shaft 71, to prevent the succeeding plates from following closely behind the one already trimmed. The fingers 62 are then returned to the dotted-line position shown in Fig. 10 by the levers 64 and springs 67, the arm 59 simultaneously moving to a position so that the stud 58 engages the lug 61 and swings the lever 47 to open the clutch 34. At the same time the rollers 20 are released, allowing the next plate to move into the arch c. The cooling-chamber, Fig. 13, comprises external and internal shells d, 104, provided respectively with channels 103, 105, from which cooling-water flows over the convex and concave faces of the plate f. The stereotype, as it enters, depresses the fingers 112 and by means of an arm 111 and link 110 opens the valve 108 on the water pipe 107, which remains open as long as a plate is in the arch. The plate is retained by fingers 114 on a spindle 115, until the succeeding plate depresses the fingers 119. A handle 122 is provided for moving the stop 114 after cooling the last plate. The trimmed and cooled plate slides out of the arch and rests against a stop 121 on an extension ? of the runway.